Hazard Analysis Example (partial)
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Hazard
Properties |
Properties |
Control/Mitigation |
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No. |
Primary Hazard |
Secondary
Hazard |
Hazard
Description |
Source |
Hazard
tolerance time/Dose tolerance |
O |
F |
C |
RC |
Preventative
Measure/ Control |
F |
C |
RC |
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ENERGY HAZARDS |
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Electrical Energy |
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1. |
Electric shock |
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Enclosure leakage current |
Mains voltage |
< 100 ms |
N |
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Meet UL 1950, IEC 950 |
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2. |
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Touchable metal parts |
Voltages > 24V |
< 100 ms |
N |
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Meet UL 1950, IEC 950 |
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3. |
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Thermal |
Internal electrical heating |
Shorts, cooling failure |
< 100 ms |
N |
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Meet UL 1950, IEC 950 |
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4. |
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Chemical |
Smoke emission |
Overheating |
< 100 ms |
N |
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Meet UL 1950, IEC 950 |
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Electromagnetic Energy |
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5. |
Susceptibility |
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Influence by other electronic systems |
Through line connection (RF, power surges, brown-outs, bursts, etc.) |
<< 1 ms |
N |
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Meet IEC1000 |
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6. |
Susceptibility |
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Influence by other electronic systems |
Through telephone network |
<< 1 ms |
N |
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Meet IEC1000 |
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7. |
Susceptibility |
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Influence by other electronic systems |
RF energy |
<< 1 ms |
N |
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Meet IEC1000 |
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8. |
Radiation |
RF interference |
Influence to other electronic systems |
Electronic circuits through line connection |
<< 1 ms |
N |
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Meet CISP-11 |
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